Steam-removing means for paper-pulp grinders



Jan. 22, 1924. 1,483,584

c. A. BAXTER STEAM REMOVING MEANS FOR PAPER PULP GRINDERS Filed Aug. 23.1922 grinding devices.

iPatented Jan. 22, 19241..

CHARLES A. BAXTER, OF WEST LINN, OREGON.

STEAM-RMEOG'MEANS FOR PAPER-PULP GRINDERS.

Application filed August 23, 1922. Serial No. 583,796.

To all whom it may concern:

Be it known that 1, CHARLES A. BAx'rnR, a citizen of the United States,and a resident of West Linn, county of Clackamas, and State of Oregon,have invented new and useful Improvements in Steam-Removing Means forPaper-Pulp Grinders, of which the following is a specification.

My invention relates to means for confining and carrying ofi the vaporsgenerated by operating devices, such for example, as

Specifically my invention relates to paper pulp grinders. in theoperation of the latter a large volume of steam is generated whichrenders the room hazardous as well as uncomfortable to the workmen; andbesides, since the building is generally built of lumber, this steam hasa tendency to cause undue rotting of the buildd dany and varied attemptshave been made to remove this steam, but as easy access must be had tothe mechanism of the grinder, a housing has been impractical. sary thatone end of the grinder be left open so that the grindstones can be jigged, that is, to have the surface roughened so that the stone willworlr efiectively. The casing also is not airti ht, and canopies and thelike which have een placed over this open side have not only interferedwith the correct operation of the machine, but also have beenineffectual inasmuch as enough steam escapes from the cracks to renderthese devices valueless.

The object of my invention is to provide simple and eficient means forconfining and carrying ofi said steam. The pulp grinder usuallycomprises a grind-stone about which are radially disposed a plurality ofdevices for holding the blocks of wood to be ground into pulp on thegrind-stone. All these devices are housed by a casing having doorsgiving access to said devices for holding the blocks of wood, and thecasing is left open at one side so as to give access to the grind stonefor the purpose of jigging the same.

ll attain my ob ect by covering said open side of the main housing by asupplemental removable, hood-like, housing section, enclosing asubstantial space constituting a chamber with which the other section isconnected by passageway extending around the parts of the pulp grinder.To the chamber are connected means for creating a draft, therebyconverting the spaces within the it is neceschamber into a region ofnegative pressure; consequently airzrushes through the devices about thedoors into said chamber, and is moved from the latter by said draftcreating means, to the atmosphere.

The walls of the removable housing section at its open side are adaptedto abut closely with said Walls at the open end of said main housingsection, and the supplemental housingsection is made of substantialmass, so that by its weight it will resist inadvertent displacement fromsuch abutment, and does not require device for fastening it to the mainsection of the housing. For said draft creating means I prefer toprovide a conduit leading from the said removable housing-section to theatmosphere, such conduit bein built in two principal sections, one ofwhich is provided on said removable housing section, constituting anintegral part thereof; and I provide means for readily connecting, anddisconnecting, said conduitsections; the latter means also being adaptedto tend to hold said removable housing section in place on its base. itis understood that the main housing is adapted to provide ample airpassageways around the parts of the pulp grinder and thence throughthesepen side of said main housing into the chamber of said supplementalhousing.

The details of the above mentioned features are hereinafter fullydescribed with reference to- Fig. 1 shows a diagrammatic elevation 01?lOO b which encloses a grinding roll 0 which rotates on the shaft (Z. Ablock of wood e is held against the periphery of this grindstone by oneof a series of hydraulic presses fand the friction between the stone andthe block of wood grinds small fibres from the block which are depositedin the bottom of the casing. A stream of water flows continuously overthe Face of the grindstone and the block and the friction between thewheel and the block generates enough heat to vaporize part of this waterwhich tends to escape to the atmosphere. The only large opening in themain housing is the open side a thru which access is had to thegrindstone. My supplemental housing section 9 is adapted to fit snuglyaround this open side and also to seat firmly on the extension 6 of thefoundation '6 and thereby to provide a substantially airtight connectiontherewith. The housing section 9 has an integral conduit section 2'which has a rounded top 9' and a lateral flange 70. A horizontal headerpipe n is connectedtoa stack or a mechanical means for producing apartial vacuum in the pipe, such for example as the fan 0, shown in Fig.1.

This horizontal header n can be connected to a series of grinders andthus the steam can all be removed by the same stack, or by the samemechanical means. It has been found by experimentation that the steamgenerated creates enough difference in pressure so that it will risewithout external aid. It has also been found that the steam passing thruthese headers and connection pipes gives ofi' enough heat to the grinderroom so as to eliminate the necessity of providing other heating devicesfor the comfort of the workmen.

Mechanical means such as the fan 0 can be provided to accelerate theremoval of the steam, but in either case the removing means causes aregion of negative pressure in the header and the air inside of thehousing section 9 and the main housing a of the pulp grinder. Thiscauses the grinding process to be carried on under a decreased pressureand as the outlet for the steam and air is larger than the summation ofthe orifices the generated steam is prevented from passing out thru theorifices in the grinder casing except thru the open side a, and thusefiectively carries away all of the vapors generated.

A loose rotatable slip joint m is connected to the conduit sectionZ andis adapted to fit over the section. j and normally to rest on thelateral flange is thus connecting the integral section 2' to thesection 1. When it is desired, however, to remove the supplementalhousing section 7 from the main housing a it is necessary to lift thisslip joint, and the section 9 can be lifted out of position. And toreplace, it is merely necessary to seat the section .9 on the foundationb and adjust the edges 9 to the casing a and then pass the slip jointover the section j and allow it to seat on the flange k.

I claim:

1. In combination with the housing of an operating device of thecharacter described, such housing having crevices in its walls and arelatively large opening at one side, of a. supplemental removablehousing section,

answer.

open at one side in correspondence with said side opening of the mainhousing, and adapted to have its walls placed in abutment with the wallsof the latter, thereby to enclose a space constituting a chamber ofsubstantial dimensions; means for creating a draft from said chamber tothe atmosphere, thereby creating a region of negative pressure in saidchamber tending to draw in exterior air through said orifices of the'main housing; such means adapted to be connected with and disconnectedfrom said supplemental housing section, thereby to permit the removal ofthe latter.

2. In combination with the housing of an operating device of thecharacter described, such housing having crevices in the walls and arelatively large opening at one side, of a supplemental removablehousing section, open at one side in correspondence with said sideopening of the main housing, and adapted to have its walls placed inabut ment with the walls of the latter, thereby to enclose a spaceconstituting a chamber of substantial dimensions; said main housing andsaid supplemental housing section being mounted on a base elevated abovethe floor, and said supplemental housing section being made ofsubstantial mass so as to tend to resist inadvertent displacement, meansfor creating a draft from said chamber to the atmosphere, therebycreating a region of negative pressure in said chamber tending to drawin exterior air through said orifices of the main housing; such meansadapted to be connected with and disconnected from said supplementalhousing section, thereby to permit the removal of the latter.

3. In combination with the housing of an operating device of thecharacter described, such housing having crevices in its walls, and arelatively large opening at one side, of a supplemental removable,housing section, open at one side in correspondence with said sideopening of the main housing, and adapted to have its walls placed inabutment with the walls of the latter, thereby to enclose a spaceconstituting a chamber of substantial dimensions; a conduit leading fromsaid chamber to the atmosphere, such conduit comprising a sectionforming an integral part of said supplemental housing section, and acomplementary section; and means for connecting, and disconnecting, saidconduit sections, thereby to permit the removal of said supplementalhousing section, said connection of the conduit sections being adaptedalso to tend to hold said supplemental housing section in place. a

4. In combination with the housing of an operating device of thecharacter described, such housing having crevices in its walls and arelatively large opening at one enemas r side, of a supplementalremovable housing section, open at one side in correspondence withsaidside opening of the main housing, I

and adapted to have its walls placed in abutment with the walls of thelatter, thereby to enclose a space constituting a chamber of substantialdimensions; a conduit leading from said chamber to the atmosphere, suchconduit comprising a section forming an integral part of saidsupplemental housing section, and a complementary section; and aslip-collar, mounted on one of said conduit sections, adjustable intoand out of engagement with the other conduit section, thereby to permitthe removal of said supplemental housing section, said connection of theconduit sections being adapted also to tend to hold said supplementalhousing section in place.

5. In combination with the housing of an operating device of thecharacter de:

scribed, such housing having crevices in the walls and a relativelylarge opening at one side, of a supplemental removable housing sectionopen at one side in correspondence with said side opening of: the mainhousing, and adapted to have its walls placed in abutment with the wallsof the latter, thereby to enclose a space constituting a chamber ofsubstantial dimensions; said supplemental housing section being made ofsubstantial mass so as to tend to resist inadvertent displacement, meansfor creating a draft from said chamber to the atmosphere, therebycreating a region of negative pressure in said chamber tending to drawin exterior air through said orifices of the main housing; such meansadapted to be connected with and disconnected from, said supplementalhousing section thereby to permit the removal of the latter, saidconnection of the conduit sections tending also to hold saidsupplemental housing section in place.

a 1'; 1 ES A. BAXTER.

